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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Depository for semen during insemination. where urine leaves the body
Lutinizing Hormone in females
vagina
Avg. bull specs
eminal vesicles
2. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
cremaster muscle
reason for seasonal breeding periods
stag
estrous
3. Front feet and head first. (except for hogs and dogs)
Jersey Cow
reason for seasonal breeding periods
normal presentation of the fetus
vulva
4. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
elastrator
cow ovulation
Holstein Cow
colostrum
5. 24 hours before end of estrus cycle
stag
mare ovulation
kidney stones also called ________ ___________ can develop in the sigmoid flexure
castration
6. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
cow ovulation
organs used in spermatogenesis
scrotal circumference (BSE)
normal presentation of the fetus
7. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
1. more cost effective - 2. powdered milk is in excess production
Hormones from both the fetus and the mom.
Reasons for gestation length being affected
Lutinizing Hormone in females
8. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
cervix
hypothalamus and pituitary gland
Where livelihood is in agriculture
polyestrous
9. Animals which have many estrous periods per year (ex: cow - sow)
polyestrous
Culls bulls earlier (2 reasons)
things to check for in a breeding soundness exam (BSE)
reason for seasonal breeding periods
10. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
prostate gland
penis sizes vs delivering methods
mastitis
11. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
what has to happen for males for copulation to occur
effects of estrogen
cow estrus
retractor muscles
12. 1-2 days
ewe estrus
burdizzo
estrus
penis proper
13. Produce testosterone. located between the seminiferous tubules
prostate gland
leydid or interstitial cells
6-8 weeks
mare gestation
14. Depository for semen during insemination. where urine leaves the body
behavioral signs of estrus
Grading choice
vagina
Sperm growth rate
15. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
hypothalamus and pituitary gland
dairy cattle pregnancy check
seminiferous tubules
testis (gonads)
16. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
sigmoid flexure
Culls bulls earlier (2 reasons)
sow gestation
Hard
17. Help to signal hormone levels which we need both in the brain right next to each other.
elastrator
Brown Swiss Cow
Where livelihood is in agriculture
hypothalamus and pituitary gland
18. Animal which has been castrated after puberty
ewe gestation
stag
Sperm survival specs
humans: stress level vs sperm
19. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
cow gestation
butterfat
Jersey Cow
Reasons for gestation length being affected
20. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Blood
why does the cow need fat deposits during pregnancy?
Follical Stimulating in males
Lutinizing Hormone in males
21. Animals which have only one estrous cycle (ex: dog - fox)
Culls bulls earlier (2 reasons)
stag
monestrous
monorchid
22. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
cow gestation
Follical Stimulating in males
Sperm growth rate
dartos muscle
23. Milk ~305 days - dry 60 days prior to calving
monestrous
Sperm growth rate
Dairy Cattle milking schedule
ewe ovulation
24. The more stressed out the male is - the less sperm he is going to produce
cow estrus cycle
vulva
humans: stress level vs sperm
why does the cow need fat deposits during pregnancy?
25. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
functions of progestrone
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Hormones from both the fetus and the mom.
26. Parturition is controlled by...
behavioral signs of estrus
cowper's gland
Hormones from both the fetus and the mom.
sigmoid flexure
27. Allows extension of penis without fibro-elastic penis
mare estrus cycle
sigmoid flexure
elastrator
ewe estrus
28. FEED
effects of BST
Size of cow in relation to the amount of milk produced
#1 cost in production
uterus
29. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
functions of progestrone
Where livelihood is in agriculture
Avg. bull specs
Size of cow in relation to the amount of milk produced
30. 45-60 days after breeding; re-breed as required
ewe estrus
dairy cattle pregnancy check
Parturition
Jersey Cow
31. 14-19 (17) days
ewe estrus cycle
Dairy Cattle Gestation
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
monorchid
32. Sperm production
humans: stress level vs sperm
Culls bulls earlier (2 reasons)
libido test (BSE)
spermatogenesis
33. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
ewe ovulation
Sperm growth rate
1. more cost effective - 2. powdered milk is in excess production
butterfat
34. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
monestrous
Dairy Cattle milking schedule
Hard
35. Look for infection - split - and rupture of the penis
penis sizes vs delivering methods
Size of cow in relation to the amount of milk produced
Hard
penis and prepuce observation (BSE)
36. Can survive ~7 days in cow. vast majority <48 hours
estrus
Sperm survival specs
dry matter and water
semen evaluation (BSE)
37. Way to know everything is alright with the breeding male
purpose of Breeding Soundness Exam (BSE) for males
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Follical Stimulating in males
stag
38. Produce testosterone. located between the seminiferous tubules
Dairy Cattle Gestation
elastrator
Culls bulls earlier (2 reasons)
leydid or interstitial cells
39. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
~1 month
spermatogenesis
pelvis
sperm cell
40. Milk ~305 days - dry 60 days prior to calving
cow estrus
Dairy Cattle milking schedule
ewe gestation
sertoli cells
41. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
feeding a high producing dairy cow
ewe ovulation
colostrum
elastrator
42. Failure to have one testis (gonad) to descend
Dairy Cattle Gestation
mare ovulation
what has to happen for males for copulation to occur
monorchid
43. What about the sperm for a bull which has been castrated but still has testicles?
testis (gonads)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
humans: stress level vs sperm
oviducts
44. Male on one pin and female on other side
accessory sex glands
testosterone
uterus
libido test (BSE)
45. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
things to check for in a breeding soundness exam (BSE)
penis proper
Culls bulls earlier (2 reasons)
Mares
46. 10-37 (21) days
Sperm survival specs
visual evaluation (BSE)
dry-off time in dairy cattle
mare estrus cycle
47. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
age and castration
testis (gonads)
functions of progestrone
butterfat
48. (LH) stimulates the Leydig cells to produce testosterone
van deferens
hypothalamus and pituitary gland
Lutinizing Hormone in males
why does the cow need fat deposits during pregnancy?
49. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
age and castration
Dairy Cattle Gestation
Parturition
burdizzo
50. To remove/separate testicles from animal's body before animal reaches puberty
penis and prepuce observation (BSE)
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
castration
urethra